CVE-2026-42280

Improper Permission Checking in Auth.js SDK

Published May 27, 2026 CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed
Description
Auth0.js is a client-side JavaScript library for Auth0. From 8.11.0 to 9.32.0, under specific preconditions, the Auth0.js SDK may improperly return user profile information using a valid access token when a specifically crafted invalid ID token is provided. This vulnerability is fixed in 10.0.0.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-8qjv-jj2q-x832 Auth.js SDK has Improper Permission Checking
History
Type Values Removed Values Added
CPEs cpe:2.3:a:auth0:auth0.js:*:*:*:*:*:node.js:*:*
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Auth0
Auth0 auth0.js
Vendors & Products Auth0
Auth0 auth0.js
Type Values Removed Values Added
Description Auth0.js is a client-side JavaScript library for Auth0. From 8.11.0 to 9.32.0, under specific preconditions, the Auth0.js SDK may improperly return user profile information using a valid access token when a specifically crafted invalid ID token is provided. This vulnerability is fixed in 10.0.0.
Title Improper Permission Checking in Auth.js SDK
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
May 28, 2026, 3:36 PM
Reserved
Apr 26, 2026, 11:53 AM
Status
Analyzed
Published
May 27, 2026, 3:16 PM
Modified
Oct 26, 2026, 11:10 AM